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-1.7-1.6c=-0.42
We move all terms to the left:
-1.7-1.6c-(-0.42)=0
We add all the numbers together, and all the variables
-1.6c-1.28=0
We move all terms containing c to the left, all other terms to the right
-1.6c=1.28
c=1.28/-1.6
c=-1/1.25
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